Ruthenium

Syntheses and characterization of η5-cyclopentadienyl and η5-indenyl ruthenium(II) complexes of arylazoimidazoles: The molecular structure of the complex [(η5-C5H5)Ru(PPh3)(C6H5–N N–C3H3N2)]+

“…The cyclopentadienyl and indenyl complexes such as [CpRu(PPh 3 ) 2 Cl] (1) and [(indenyl)Ru(PPh 3 ) 2 (MeCN)] + (8) reacted with arylazoimidazoles (RaaiR 0 ) in the presence of ammonium salts in methanol to form the mononuclear cationic cyclo-pentadienyl and indenyl ruthenium complexes having the general formula [Cp 0 Ru(PPh 3 )(RaaiR 0 )] + (Cp 0 = cyclopentadienyl, indenyl) (Scheme 1). The cationic complexes 2-7 are brownish-green, while the complexes 9-12 are brown in color.…”

“…However, no reports are available on these halfsandwich ruthenium complexes with azoimine ligands. The complex [(g 5 -C 9 H 7 )Ru(PPh 3 ) 2 Cl] differs from its analogue [(g 5 -C 5 H 5 )Ru(PPh 3 ) 2 Cl] in certain aspects such as stability of the complex in solution. Reaction of the complex [(g 5 -C 9 H 7 )Ru (PPh 3 ) 2 Cl] with N-donor bases in methanol yielded the complexes without the indenyl group, resulting in simple coordination compounds.…”

“…The complex [(g 5 -C 9 H 7 )Ru(PPh 3 ) 2 Cl] differs from its analogue [(g 5 -C 5 H 5 )Ru(PPh 3 ) 2 Cl] in certain aspects such as stability of the complex in solution. Reaction of the complex [(g 5 -C 9 H 7 )Ru (PPh 3 ) 2 Cl] with N-donor bases in methanol yielded the complexes without the indenyl group, resulting in simple coordination compounds. However, insofar as our knowledge goes, the chemistry of bidentate nitrogen-chelating indenyl-ruthenium complexes remains relatively unexplored [21].…”

“…The major work has grown around N,N-chelating pyridine bases and related species [2][3][4][5][6][7][8][9][10][11]. The number of heteroatoms, the ring size, and the substituents in the heterocyclic ring significantly modify the p-acidity and regulate the physical and chemical properties of the compounds [12].…”

“…The chemistry of ruthenium with unsaturated nitrogen ligands [2][3][4][5][6][7][8][9][10][11] has been studied extensively in recent times, including the study of photophysical and photochemical properties.…”